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(No Model.) 5 Sheets-Shee1; 1.

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' STAVE BENDING MACHINE.

No. 564,203. Patented July 21, 1896.

(No Model.)

em Ji 5 Sheets-Sheet 2. -W. L. KELLOGG.

STAVE BENDING' MACHINE.

Patented July 21, 1896.

(No Model.) 5 Sheets-Sheet 3.

W. L. KELLOGG.

STAVE BENDING MACHINE.

No. 564,203. Patented Jul 21, 1896.

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W. L. KELLOGG.

STAVE BBNDING MACHINE.

(No Model.)

Patented July 21, 1896.

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W. L. KELLOGG.

STAVE BENDING MACHINE. v

No. 564,203. Patentd July .21, 1896.

I v William cfijf ll gg UNITED STATES PATENT OFFICE.

\VILLIAM L. KELLOGG, OF INDIANAPOLIS, INDIANA.

STAVE-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 564,203, dated July 21,1896. Application filed January 20,1896- Serial No. 576,159. 1N0 model.)

To all whom it may UOILCUIIL.

Be it known that 1, WILLIAM L. KELLOGG, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented a new and useful Stave-Bending Machine, of which thefollowing is a specification.

My invention relates to an improvement in machines for bending thestaves used in the manufacture of beer and other similar barrels,thereby providing said staves with the proper bilge.

The object of my invention is to provide a machine in which the stavewill be constantly supported both upon its inner and outer surfacesduring the entire process of bending.

The accompanying drawings illustrate my invention.

Figure 1 is aside elevation of my machine. Fig. 2 is a central verticalsection on line 2 2 of Fig. 1. Fig. 3 is a central horizontal section online 3 3 of Fig. 1. Fig. 4 is a central transverse section on line a 4of Figs. 2 and 3. Figs. 5 and 6 are side elevations, respectively, ofthe front and rear sides of the main cam. Figs. 7 and 8 are details of aportion of one of the clamp-lifting pins. Figs. 9 and 10, respectively,are side and end elevations of one of the guide-shoes. Fig. 11 is aperspective view of a stave before it has been bent, and Fig. 12 is asimilar view of the stave after it has been bent.

In the drawings, 11 indicates a pair of baseframes, the upper portion ofsaid frames being connected by a stationary shaft 12, which carries nearits middle a cam 13, rigidly secured thereto by any suitable means, suchas key 14:.

Mounted so as to revolve on shaft 12-, one at each end of cam 13, are apair of disks 15, and between these disks and secured thereto,

so as to revolve therewith, is an annular ring of standards 18, saidstandards being ar-' ranged in pairs opposite each other. The upper endsof each pair of standards are connected by a pin 19, and on each ofthese pins .is pivoted a guide-shoe by means of the upwardly-extendingcars 21.

Guide-shoes 20 are each provided with a shoulder 22, adapted to engageone end of the stave 23, and are also provided with a projecting flange24., the under side of which is hollowed out so as to fit the outersurface of the stave end. In shoulder 22 is formed a slot 25, said slotallowing the end of clamps 26 to engage with the ends of the stave afterit has been sufficiently bent.

Upon pin 19, between cars 21, is mounted one end of a forming-bridge 27,said bridge extending across the machine and being mounted in a similarmanner upon the pin 19, carried by the opposite pair of standards 18.

The inner surface of each bridge 27 is curved to conform to thecurvature to which the stave is to be bent, and each end of said bridgeis rounded, as at 28.

Mounted between the forming-bridge 27 and the guide-shoes 20 is a flatspring 29, said spring being provided with upturned ends 30, which areadapted to embrace the rounded ends 28 of the forming-bridges, and beingalso provided with a longitudinal slot 31, which extends between theopposed ends of guide-shoes 20. Carried by spring 29 between the opposedends of the guide-shoes are a series of forming-blocks 32, said blocksbeing secured to the spring by means of the screws 33, which pass downthrough slot 31 and into the blocks. The inner surface of each block 32is curved so as to fit the rounded outer surface of the stave, and eachof said blocks is preferably provided upon its outer surface with agroove 31, adapted to receive spring 29.

In order that spring 29 may come directly into contact with the innercurved surface of the forming-bridge, I form in said inner surface arecess 35, which is adapted to receive the heads of screws 33. In ring16, directly under each forming-bridge, I form a longitudinal slot 36,and through each slot is passed a series of plungers 37. Eachplunger 37is provided at its inner end with a roller 38, which engages cam 13, andis bifurcated at its outer end, the opening between the two fingers thusformed being sufficient to, admit clamps 26.

The outer ends of .plungers 37 are broadened, as at 39, so that theseries will form a practically continuous surface, and the saidbroadened ends are rounded, as shown in Fig. 4, so as to fit the innersurface of the stave.

In the outer periphery of each flange 17, opposite each endof each slot36, and connecting therewith, is formed a shallow recess 40, each pairof recesses being adapted to receive and support the ends of clamps 26.Mounted below each recess 40, and communicating therewith through holes41, formed in the bottoms of said recesses, is a clamp-lifting pin 42.The outer end of said pin is supported in hole 41, and may play freelytherethrough. The inner end of pin 42 is supported in a bearing 43,carried by disks 15, and to prevent said pins from dropping out of placestud 44is extended into the opening of bearing 43, and engages a shortslot 45, formed in the said pin.

For the purpose of lifting pins 42 and thereby forcing clamps 26 intoengagement with the stave, a pair of cams 46 are provided, said camsbeing carried by castings secured to the base-frames. Cam 13 is soformed that the pressure exerted through plungers 37 to the stave willbe a gradual one, said pressure beginning when the plungers liesubstantially in a horizontal plane at the front of the machine, andcontinuing until the said plungers lie in a vertical plane in theirextreme upward position, as shown in Figs. 3 and 4. The surface of saidcam is from this point brought suddenly toward the axis a sufficientdistance to allow the plungers, as they pass the extreme upwardposition, to quickly drop from engagement with the inner surface of thestave.

It is desirable that the pressure against the stave be at all timesnormal thereto, and it is therefore necessary as the plungers arecarried about the cam that their inner ends be forced nearer together,and that when the stave has been bent the said inner ends be forcedapart.

To positively insure the above-mentioned movement, the cam 13 isprovided with a series of tracks or grooves 47, the central track beingstraight and lying in a plane at right angles to the axis thereof, whilethe other tracks are arranged symmetrically on each side of said centraltrack. It is also advisable to so form the cam 13 that the plungers willat all times lie normal thereto, and for that reason the said cam forthe first ninety degrees is made parallel to the axis, but from thatpoint through the other two hundred and seventy degrees the cam is givenagradually-increasing bilge, as shown in Figs. 5 and 6.

For the purpose of holding spring 29 in its extreme upward position, Isecure to one of screws 33 a spring-catch 48, which extends outwardthrough an opening 49 in the forming-bridge, and is adapted, when forcedto its extreme upward position, to engage with the outer surface of saidforming-bridge.

Bin g 16, disks 15, and the various attached parts are rotated about theshaft 12 in any snitable manner, preferably by means of an internal gear50, secured to the inner periphery of one of the flanges 17, a spur-gear5]., carried by a shaft 52, mounted in suitable bearings on the mainframe, a worm-gear 53, secured to said shaft, a worm 54, engaging saidworm-gear, and a driving-pulley 55, secured to the worm-shaft.

In operation, ring 16, carrying the series of formin g-bridges andattached parts, is caused to slowly revolve about cam 13, in thedirection indicated by the arrow in Figs. 1 and 4. All of catches 48 arereleased and the springs 29 assume their normal straight position, asindicated in the lower part of Fig. 3. The operator, having beenpreviously provided with a number of clamps 26, and alsoa number ofstaves 23, formed as shown and thoroughly steamed, places one of theclamps in recesses 40 under the forming-bridge, which lies in about theposition 56 in Fig. 4, and then introduces one of the staves 23, theends of said stave being received and engaged by the guide-shoes and theouter central portion of said stave being in engagement with theforming-blocks 32, carried by spring 29. As the machine advances, theplungers under the before-mentioned bridge are forced outward by cam 13into engagement with the stave, the bifurcated ends of said plungersstraddling the central portion of the clamp. A farther advance of themachine causes the plungers to be forced outward by cam 13, the innerends of said plungers being at the same time drawn toward each other bytracks 47, so that the said plungers will always lie substantiallynormal both to the stave and to the cam.

It will be noticed that during the entire operation of bending both theinner and outer surfaces of the stave, through the entire portion whichis being bent, are supported and held between the plungers and the innersurfaces of block 32, said blocks conforming to the bend by means of thespring 29. Vhile the machine advances another formingbridge is broughtinto the position 56 and another clamp and stave are inserted, and thisoperation is repeated until all of the formingbridges have passed thisposition. When the first-mentioned forming-bridge has reached theposition 57, Figs. 1 and 4, the inner ends of the pins 42 which liethereunder come into engagement with the cams 46 and are thereby forcedoutward and lift clamp 26 from recesses 40 and force it into engagementwith the ends of the bent stave. The stave in the meantime has beenforced into its extreme outward position and bent, and catch 48 has comeinto engagement with the outer surface of the bridge, thereby holdingthe spring in its extreme flexed position. A farther advance of themachine causes the inner ends of plungers 37 to be carried beyond thelargest radius of the cam and they are allowed to drop suddenly out ofengagement with the stave andfree from the clamp, the said inner endsbeing forced apart at the same time by means of the tracks 47. The staveand attached clamp is then removed, catch 48 is released, and a newclamp and stave introduced. The operation of the machine is a continuousone, the bending is done by a normal pressure, every part of the innerand outer surfaces of the bent portion of the stave is supported duringthe entire operation, and there is no friction between the stave and anypart of the machine.

I claim as my invention 1. In a stave-bending machine, the combinationwith means for supporting a stave, of a series of independent plungerseach adapted to engage at one end with the stave and at the other endwith a cam lying substantially normal thereto, the cam, and means forcausing a relative rotative movement between the plunger and the cam,whereby the plungers are forced outward into engagement with the staveand remain substantially normal thereto during the process of bending,substantially as set forth.

2. In a stave-bending machine, a spring supported near its ends andcarrying intermediate thereof a series of independent forming-blocksadapted to engage and support the outer surface of a stave during theprocess of bending, substantially as set forth.

In a stave-bending machine, the combination with the main frame, of acam supported thereby, a series of plungers supported, in a guide,substantially normal to said cam, the inner ends of'said plungersengaging with said cam and the outer ends of said plungers being adaptedto engage with the inner surface of a stave, a spring, lyingsubstantially parallel to said stave, supported by its ends on the frameand carrying means for engaging and supporting the outer surface of thestave, and means for causing a relative rotative movement between theplungers and the cam, substantially as described.

4. In a stave-bending machine, the combination with the main frame, of acam provided with a series of peripheral tracks supported thereby, aseries of plungers supported, in a guide, substantially normal to 'saidcam, the inner ends of said plungers engaging with the tracks formed onsaid cam and the outer endsof said plungers being adapted to engage withthe inner surface of a stave and to remain substantially normal thereto,a support for the stave, and means,

for causing a relative rotative movement between the plungers and thecam, substantially as and for the purpose set forth. 5. In astave-bending machine, the combination withthe main frame, of a camsupported thereby, a series of plungers supported, in a guide,substantially normal to said cam, the inner ends of said plungersengaging with the said cam and the outer ends of said plungers beingadapted to engage with the inner surface of the stave, a support for thestave, means for causing a relative rotative movement between theplungers and the cam, whereby the plungers are forced outward againstthe stave and the stave is thereby bent, and means for automaticallyforcing a clamp into engagement. with the ends of said bent stave duringsaid relative rotation, substantially as set forth.

6. In a stave-bending machine, the combination with the main frame, of acam supported thereby, a series of plungers sup ported, in a guide,substantially normal to said cam, the inner ends of said plungersengaging with said cam and the outer ends of said plungers being adaptedto engage with the inner surface of a stave, a pair of pivotedguide-shoes adapted to receive and support the ends of said stave, andmeans for causing a relative rotative movement between theplungers andthe cam, whereby the plungers are forced outward against the stave andthe stave isthereby bent, substantially-as described.

7. In a stave-bending machine, the combination with the main frame, of acam supported thereby, a series of plungers supported, in a guide,substantially normal to said cam, the inner ends of said plungersengaging with said cam and the outer ends of said plungers being adaptedto engage with the inner surface of a stave, a pair of pivotedguide-shoes adapted to receive and support the ends of said staves, aspring supported at its ends and carrying a series of formingblocksadapted to engage and support the outer surface of the stave, and meansfor causing a relative rotative movement between the plungers and thecam, substantially as and for the purpose set forth.

8. In a stave-bending machine, the combination with the main frame, of acam supported thereby, a series of plungers supported, in a guide,substantially normal to said cam, the inner ends of said plungersengaging with said cam and the outer ends of said plungers being adaptedto engage with the inner surface of a stave, a pair of pivotedguide-blocks adapted to receive and support the ends of said stave, aforming-bridge extending between said guide-blocks, a spring supportedat its ends by said forming-bridge and carrying a series offorming-blocks adapted to engage and support the outer surface of thestave, and means for causing a relative rotative movement between theplungers and the cam, substantially as and for the purpose set forth.

9. In a stave-bending machine, the combination with the main frame, of acam sup-' ported thereby, a seriesof plungers supported, in a guide,substantially normal to said cam, the inner ends of said plungersengaging with said cam and outer ends of said plungers be ing adapted toengage with the inner surface of a stave, a pair of pivoted guide-blocksadapted to receive and support the ends of said stave, a forming-bridgeextending between said guide-blocks, a spring supported at its ends bysaid forming-bridge and carrying a series of forming-blocks adapted toengage the outer surface of the stave, means for holding said spring inits extreme flexed position, and means for causing a relative rotativemovement between the plunge rs an d the cam, substantially as described.

10. In a stave-bending machine, a yielding former mounted therein andadapted to support the outer surface of the stave during the process ofbending, and means for holding said former in its flexed position sothat the stave may be removed therefrom, substantially as set forth.

11. In a stave-bendin g machine, the combination of the main framecarrying a station ary shaft, a cam carried by said shaft and rigidlysecured thereto, a ring carried by said shaft and revoluble thereonabout said cam, a guide formed in said ring, a series of plungersmounted so as to move in said guide, the inner ends of said plungersengaging the cam and the outer ends of said plungers being adapted toengage the inner surface of a stave, means for supporting said stave,and means for rotating said ring about the cam, substantially asdescribed.

12. In a stave-bending machine, the combination of the main framecarrying a stationary shaft, a cam carried by said shaft and rigidlysecured thereto, a ring carried by said shaft and revoluble thereonabout said cam, a guide formed in said ring, a series of plungersmounted so as to move in said guide, the inner ends of said plungersengaging the cam and the other ends of said plungers being adapted toengage the inner surface of a stave, a yielding support for the outersurface of the stave, and means for rotating said ring about the cam,substantially as set forth.

13. In a stave-bending machine, the combi nation of the main framecarrying a stationary shaft, a cam carried by said shaft and rigidlysecured thereto, a ring carried by said shaft and revoluble thereonabout said cam, a series of guides formed in said ring, a series ofplungers mounted in each guide so as to move therein, the inner ends ofsaid plungers engaging the cam and the outer ends of each series of saidplungers being adapted to engage the inner surface of a stave, ayielding support mounted over each series of plungers and adapted tosupport the outer surface of a stave, and means for rotating said ringabout the cam, substantially as described. a

ll. In a stave-bending machine, the combination of the main framecarrying a stationary shaft, a cam carried by said shaft and rigidlysecured thereto, a ring carried by said shaft and revoluble thereonabout said cam, a series of guides formed in said ring, a series ofplungers mounted in each guide so as to move therein, the inner ends ofsaid plungers engaging the cam and the outer ends of each series of saidplungers being adapted to engage the inner surface of a stave, ayielding support mounted over each series of plungers and adapted tosupport the outer surface of the stave, means for holding a clamp undereach stave, a pair of pins mounted below said clamp-receiving means andadapted to be forced outward by means of a pair of cams carried by theframe, whereby the said clamp may be forced into engagement with thebent stave, and means for rotating said ring about the cam,substantially as set forth.

15. In a stave-bending machine, the combination of the main framecarrying a stationary shaft, a cam carried by said shaft and rigidlysecured thereto, a ring carried by said shaft and revoluble thereonabout said cam, a series of guides formed in said ring, a series ofplungers mounted in each guide so as to move therein, the inner ends ofsaid plungers engaging the cam and the outer ends of each series of saidplungers being adapted to engage the inner surface of a stave, a pair ofpivoted guide-shoes mounted over each guide in the ring, and adapted toreceive and support the ends of a stave, a spring supported at its endsand carrying a series of independent forming-blocks extending between.the guide-shoes and adapted to engage the outer surface of a stave, aforming-bridge extending between each pair of guide-shoes, means carriedby the spring for engaging with said forming-bridge and'thereby holdingthe said spring in its flexed position, means carriedby the ring forholding a clamp under each stave, a pair of radially-movable pinscarried by said ring under each clamp-holding means in a position toengage said clamp, a pair of cams mounted on the base-frame in aposition to engage with and force said pins outward, thereby forcing theclamp into engagement with the bent stave, and means for rotating saidring about the cam, substantially as and for the purpose set forth.

16. In a stave-bending machine, means for holding a clamp under thestave, a pair of radially-movable pins mounted under said clamp in aposition to engage therewith, and a pair of cams secured to the mainframe and adapted to engage the inner ends of said pins, whereby, as thepins are carried past said cams, the clamp is forced outward intoengagement with the stave, substantially as and for the purpose setforth.

17. In a stave-bending machine of the class described, a cam for bendingthe stave, said cam having a portion of its periphery parallel with theaxis of the cam, and another portion of its surface provided with agradually-increasing bilge, substantially as set forth.

18. In a stave-bending machine of the class described, a cam for bendingthe stave, said cam having a portion of its periphery parallel surfaceof the cam and to the stave during the process of bending, substantiallyas and 10 for the purpose set forth.

WVILLIAM L. KELLOGG.

Witnesses:

ERNEST K. H001), A. M. HOOD.

